Revert of Rewrote UpdateToMix in the audio mixer.

Revert of Rewrote UpdateToMix in the audio mixer. (patchset #5 id:120001 of https://codereview.webrtc.org/2132563002/ )

Reason for revert:
Multiple definitions of  webrtc::MockMixerParticipant::MockMixerParticipant() during linking of modules_unittests. Please investigate and resubmit.

Original issue's description:
> Rewrote UpdateToMix in the audio mixer.
>
> The new version is much shorter than the old one, and hopefully easier
> to read. This is part of the effort to rewrite the old mixer.
>
> Committed: https://crrev.com/2942e240f4a985752714dac18c141064c97696d4
> Cr-Commit-Position: refs/heads/master@{#13568}

TBR=ossu@webrtc.org,ivoc@webrtc.org,aleloi@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/ea4c141ffa1cfa6b7ac53fab63722e6373e5db0e
Cr-Commit-Position: refs/heads/master@{#13569}

[terelius, 2016-07-29 08:36:00]

The CQ bit was checked by terelius@webrtc.org

[terelius, 2016-07-29 08:36:00]

Created Revert of Rewrote UpdateToMix in the audio mixer.

[commit-bot: I haz the power, 2016-07-29 08:36:04]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2016-07-29 08:36:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-29 08:36:28]

Description was changed from

==========
Revert of Rewrote UpdateToMix in the audio mixer. (patchset #5 id:120001 of
https://codereview.webrtc.org/2132563002/ )

Reason for revert:
Multiple definitions of  webrtc::MockMixerParticipant::MockMixerParticipant()
during linking of modules_unittests. Please investigate and resubmit.

Original issue's description:
> Rewrote UpdateToMix in the audio mixer.
> 
> The new version is much shorter than the old one, and hopefully easier
> to read. This is part of the effort to rewrite the old mixer.
> 
> Committed: https://crrev.com/2942e240f4a985752714dac18c141064c97696d4
> Cr-Commit-Position: refs/heads/master@{#13568}

TBR=ossu@webrtc.org,ivoc@webrtc.org,aleloi@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of Rewrote UpdateToMix in the audio mixer. (patchset #5 id:120001 of
https://codereview.webrtc.org/2132563002/ )

Reason for revert:
Multiple definitions of  webrtc::MockMixerParticipant::MockMixerParticipant()
during linking of modules_unittests. Please investigate and resubmit.

Original issue's description:
> Rewrote UpdateToMix in the audio mixer.
>
> The new version is much shorter than the old one, and hopefully easier
> to read. This is part of the effort to rewrite the old mixer.
>
> Committed: https://crrev.com/2942e240f4a985752714dac18c141064c97696d4
> Cr-Commit-Position: refs/heads/master@{#13568}

TBR=ossu@webrtc.org,ivoc@webrtc.org,aleloi@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/ea4c141ffa1cfa6b7ac53fab63722e6373e5db0e
Cr-Commit-Position: refs/heads/master@{#13569}
==========

[commit-bot: I haz the power, 2016-07-29 08:36:29]

Patchset 1 (id:??) landed as
https://crrev.com/ea4c141ffa1cfa6b7ac53fab63722e6373e5db0e
Cr-Commit-Position: refs/heads/master@{#13569}